Impact-pulverizer.



R. C. NEWHOUSE.

' IMPACT PULVERIZER.

APPLICATION FILED OCT. 20. 19h.

Patented Jan. 16, 1917.

2 SHEETS-SHEET l.

ATT :11? N EY- R.C.NEWHOUS E.

IMPACT PULVERIZER.

APPLICATION EILED OCT. 20.1911.

,99 1. latvnt'ed Jan. 10, 1917.

2 SHEETS-SHEET 2.

INVENTEI f'ATTEaR m EY BAY C. NEWHOUSE, 0F MILWAUKEE, WISCONSIN,.ASSIGNOR, BY MESNE ASSIGNMENTS, TG ALLIS-CHALMERS MANUFACTURINGCOMPANY, A CORPORATION OF DELAWARE.

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Specification of Letters Patent. Paflhgntfidl J an. 116, TWWoApplication filed October 20, 1911. Serial 110,655,716.

To all whom it may concern:

Be it known that I, RAY G. NEWHOUsE, a citizen of theUnited States,residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented a certain new and useful Improvement in Impact-Pulverizer's, of which the following is a specificationgj J Thisinvention relates to improvements in the construction of rotary impactpulverizersin which raw material is pulverized by being repeatedlysubjected to impactwith a series of rapidly revolving beatersor balls.

The object of the invention is to provide a simple and effioient meansfor taking up the wear on the beatersor bails of impact pulverizers,

such wear resulting from the grinding action of the material on the endsof the bails.

Anotherobject of the invention is to provide a removable wearing shoe orbar adapted for'attachment at the end of the bail, so

that when the shoe or bar becomes worn itcan be replaced by anotherwithoutnecessitating replacement of the entire bail.

A clear conception of several embodiments of the invention can be had byreferring to the drawings accompanying and forming part of thisspecification, in which like reference characters designate the same orsimilar parts in the difierent views.

Figure "1 is a central vertical section through an impact pulverizercasing showing a series of beaters or bails with removable wearing shoesmounted thereon. Fig. 2 is an enlarged front view of one of thebails'showing a removable wearing shoe or beater portion mountedthereon. Fig. 3 is a side view of a modified form of bail at tached to asuspension member. Fig. 4: is a front view of a modified form of bailhaving a removable wearing bar or heater portion mounted thereon. Fig. 5is a-front view of a modified form of'bail or beater portion constructedof one piece. Fig. 6 is a side view of a suspension member having ingsformed in the casing and has a suspension member 8 fixed thereto at apoint lntermediate the shaft bearings.

The beaters or bails 10, 11, 12, are suspended from a series of pivots13, which are fixed to the suspension member 81 The liners 3, 4, 5, are

fixed to the cover 2 of the casing and have ing and permit the freedischarge of: pulverized material from within the pulverizing chamber.

. Thebeaters or and 2, are provided with removable beater bails10,11,12, see Figs. 1 l

portions or wearing shoes 14:, these shoes b'eing fixed to the ends ofthe bails by means of dovetails 15 coacting in similarly formed recessesor slots in the ends of the bails, The dovetails 15 and the, slots inwhich they coact, extend along the entire length of-the shoes 14 andbails 10, 11,12, the members being locked together by means of vpins16,. which pass transversely through the said shoe and bail. The lockingof the shoes to the bailsis insured by so. inserting the pins 16 thatone half of the pin extends above and the other half below the plane ofcoaction between the shoes and bails." The portions of the beaters orbails 12 not including] the wearing shoes are off-considerably lesslength, measured radially of the rotor, than similar portions of theheaters or-bails 11,

while corresponding portions of the bails 11 are of considerably lesslength, measured; rad ally of the rotor, than corresponding portions ofthe bails 10. The overall radial lengths of the bails with thewearingshoes attached, are, however, the same, so that the radial distancesfrom .thecenters ofthe sus pension pivotsl3 to the center of the shaft 9are equal. It will thus be noted that since the lengths of the bails 10,11, 12 are different, and the distances from the centers ofthesuspension pivots 13 to the center-of and liners. y

In the modified form of bail disclosed in Figs. 3 and 4, the pivots 13are equidistant.

. 6,0 mvolute lmpact surfaces formed thereon,

loothe shaft 9' are equal, the thickness of the from the shaft center.Each of the bails 100, 101, 102, comprises a palr of radlally vextending eye-bolts the outer ends of which have screw threads 150 whichcoact in screw .are secured to the outer endsof the bolts 102 areconsiderably thicker, measured radially of the rotor, than the bars 141securedto the outer ends of the bolts 101,

while the bars secured to the bolts 101 are' considerably thicker,measured radially of the rotor, than the bars which are secured to theendsof the bolts 100.-

In the modified form of the invention disclosed in Figs. 5'. and 6,beaters or bails 110, 130, 120 are formed. with the wearing barsintegral with the arms, the lengths of the bails, measured radially ofthe rotor, being different. The entire bail in this case forms thebeater portion.v The Wearing bar 140 of the bail 110 is considerablythicker-,1 f measured radially, than the wearing bar 140 of the bail130, while thewearingl bar of the bail-130 is considerably thicker-[thanther the bars 141, however,

bar of the bail- 120. ln ordertoretain equal distances from the..centershaft tothe outer extremes'of the bails, --the distances from thecenters of the pivots 13 to the shaft center are different-.- The bail110'has its pivot -nearer to the shaft center than the bail 130,

while the bail 130 is mounted nearer to the shafficente'r than the bail120.

During the operationof the p'ulverizer, theshaft 9 and suspension member8 are given a rapid rotarymotion carrying with them thebeaters. 10, 11,12. The raw material to be pulverized is admitted throughwith thematerial, of the material between the screen bar 7 and 3 the inletportion or hopper l of the caslng and falls directlycinto the circularpath of the moving bails. The rapid motion of the beater portions whichtraverse a circular path, causes the material to be thrown by the impactand-by the action of centrifugal force, against the involute surfaces ofthe liners 3, 4, 5. The material after striking' the involute liners isreturned to the path of the beater portions, from which it is againthrown against the liners. The successive outward throwing and returningof the' material from' and to the beater portion -path continues untilthe material is sufiiciently pulverized to be drawn by suction fromWithin the pulverizing chamber through the discharge screen. Due to thesuccessive impacts of the beater portions 14 and also due to grindingthe ends of th'e'bails, the beater portions bar.

eventually become worn, causing the existence of a greater space betweenthe ends of the bails and the screen bars 7. This increase in the widthof the space between the ends of the bails and the screen bars causesthe discharged product to become coarser, necessitating a means foroutwardly adjusting the beater portions.

In the form of the invention disclosed in Figs. 1 and 2, the adjustmentfor wear is made by removing the worn shoes 14 from one of the bails andinserting the same in the next longer bail. For instance, as the shoe 14of the bail 12 becomes worn, it is removed and inserted in the nextlonger bail 11, a new shoe 14 being inserted in the end of the bail 12.The shoe 14, removed from the bail 11, is insertedin the next longerbail 10, while the shoe 14, formerly attached to the bail 10 afterhavingbeen worn, being. unfit for further use, is discarded. In this way itwill be seen that the shoes 14 can be completely utilized and that theparts subjected to. wear can be easily replaced without renewal of theentire bails.

closed in Figs. 3 and 4, the progress of the wearing bars. 141 issimilar to that of the -wearing shoes 14 as disclosed in Figs. 1 and 2,the method of attaching and removing differing. The bars 141 are removedfrom their respective eyebolts by removing the entire bail from itspivot and unscrewing the eye-bolts from the With this construction itwill be apparent that each of the suspension pivots 1'3 automaticallyand effectively locks the screw-threaded ends of the eye-bolts whichform the means for securing the eye-bolts to the beater bar, againstdisplacement since the pivot besides forming a means for swingablysuspending the bail, also prevents relative rotation 'of' theeye-boltsand the attached wearing shoe or beater portion. It will be noted thatthe bars 141 can be attached to pairs of eye-bolts 100, 101, 102, ofsuitable lengths, thereby again permitting complete utilization of thebars 141 and replacement thereof, without necessitating renewal of theeye-bolts.

In the modification of the invention as disclosed in Figsf5 and 6, thebail 110 is advanced to a pivot which is mounted farther away from theshaft center, after its corresponding impact bar 140 has become worn,the bail 130 constituting the worn bail in its new position. After thebail 130 has become worn, it is advanced to a pivot having a stillgreater distance between its center and the center of the shaft, thebail'120'constituting the advanced'bail in its new and final position.After the bail 120 has become further worn, it is unfit for further use.

With these constructions of bails itwill be seen that a simple andeiiicient means for maintaining the proper fineness of the dischargedmaterial is obtained. It will also be seen that the greatest amount ofservice possible is to be had from the bails. With the construction asdisclosed in Figs. 2 and 4:, the heater portions 14, 141, can he made ofany desirable material, as, for instance,'tool steel, withoutnecessitating the construction of the bails and bolts 101 of a similarmaterial. Themeans of attaching the beater portions in each of thesetwo. constructions is also simple and efficient and permits readyremoval of the beater portions.

By arranging the heaters of the several series so-that diametricallyopposite heaters are-of substantially like thickness, the impact rotormay be maintained in a substantially balanced condition at all times.-Such balancing of the rotor is desirable due to the high rate ofrevolution thereof which is necessary in order to produce most efficientpulverization. If the rotor is notsuhstantially balanced, undesirablevibration of the machine results; The provision of several series ofheaters of different thicknesses also permits gradual renewal of theWorn out heaters, two at a time, without necessitating simultaneousrenewal of all of the heaters. If all of the-heaters are renewed at thesame time and allowed to remain in their ,initial. position until they:are completely Worn out, there will he considerabledifierence betweenthe clearance at the ends of the heaters at the time of renewal thereofand the clearance existing just preceding discarding of the worn outheaters. This difference in clearance would produce .con-

siderable difference in the fineness of the material discharged from thepulverizer a diiferent times. v v

It should be understood that it is not desired to be limited to theexact details of construction shown and described, for obviousmodifications will occur to a person nally of said shaft, and'the barsof successive heaters being of diderent thicknesses;

' 2. In combination, av rotary element, a

pair of arms each having a threaded end, a pivotfor suspendlng said armsfrom said element, and a heater having threadedsockets. engagingsaidthreaded arm ends, said pivot serving" to lock said arms againstmovement relative to said heater.

3. ln 'comblnatlon, a rotor'comprlsing a being of substantially likethickness.

4. In combination, a rotor comprising several series of heaters, eachheater comprising a plurality of spaced suspensionarms and a bar securedto said arms, the bars of successive heaters of each series beingofdifi'erent thickness, and diametrically opposite heaters of saidrotor-being of like thickness.

In testimony-whereof, the signature of the inventor is'aflixed hereto inthe presence of two. witnesses.

RAY o. NEWHOUSE.

Witnesses:

CHAS; L. BYRON, W. H. LIEBER.

plurality of heaters of progressively'difl'erent thickness,diametrically opposite heaters

